Lint\Lint::checkSyntax()

Complexity

Conditions	7
Paths	20

Size

Total Lines	53
Code Lines	32

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
  protected static function checkSyntax($sourceCode, $addTags = FALSE) {
    if ($addTags)
      // We add the PHP tags, else the lint ignores the code. The PHP command line option -r doesn't work.
      $sourceCode = "<?php ".$sourceCode." ?>";

    // Try to create a temporary physical file. The function `proc_open` doesn't allow to use a memory file.
    if ($fd = fopen("php://temp", "r+")) {
      fputs($fd, $sourceCode); // We don't need to flush because we call rewind.
      rewind($fd); // Sets the pointer to the beginning of the file stream.

      $dspec = array(
        $fd,
        1 => array('pipe', 'w'), // stdout
        2 => array('pipe', 'w'), // stderr
      );

      $proc = proc_open(PHP_BINARY." -l", $dspec, $pipes);

      if (is_resource($proc)) {
        // Reads the stdout output.
        $output = "";
        while (!feof($pipes[1])) {
          $output .= fgets($pipes[1]);
        }

        // Reads the stderr output.
        $error = "";
        while (!feof($pipes[2])) {
          $error .= fgets($pipes[2]);
        }

        // Free all resources.
        fclose($fd);
        fclose($pipes[1]);
        fclose($pipes[2]);
        $exitCode = proc_close($proc);

        if ($exitCode != 0) {
          $pattern = array("/\APHP Parse error:  /",
            "/in - /",
            "/\z -\n/");

          $error = ucfirst(preg_replace($pattern, "", $error));

          throw new \RuntimeException($error);
        }
      }
      else
        throw new \RuntimeException("Cannot execute the `php -l` command.");
    }
    else
      throw new \RuntimeException("Cannot create the temporary file with the source code.");
  }

}